Spin-affected reflexive and stretching separation of off-center droplet collision

doi:10.1103/PhysRevFluids.7.013603

	Spin-affected reflexive and stretching separation of off-center droplet collision
	He CM(何成明); Yue LJ(岳连捷); Zhang,Peng
通讯作者	Zhang, Peng(pengzhang.zhang@polyu.edu.hk)
发表期刊	PHYSICAL REVIEW FLUIDS
	2022-01-18
卷号	7 期号:1 页码:25
ISSN	2469-990X
摘要	Recent studies have demonstrated the significant roles of droplet self-spin motion in affecting the head-on collision of binary droplets. In this paper, we present a computational study by using the volume-of-fluid method to investigate the spin-affected droplet separation of off-center collisions, which are more probable in reality and phenomenologically richer than head-on collisions. Different separation modes are identified through a parametric study with varying spinning speed and impact parameter. A prominent finding is that increasing the droplet spinning speed tends to suppress the reflexive separation and to promote the stretching separation. Physically, the reflexive separation is suppressed because the increased rotational energy reduces the excessive reflexive kinetic energy within the droplet, which is the cause for the droplet reflexive separation. The stretching separation is promoted because the increased droplet angular momentum enhances the local stretching flow within the droplet, which tends to separate the droplet. The roles of orbital angular momentum and spin angular momentum in affecting the droplet separation are further substantiated by studying the collision between two spinning droplets with either the same or opposite chirality. In addition, a theoretical model based on conservation laws is proposed to qualitatively describe the boundaries of coalescence-separation transition influenced by droplet self-spin motion.
DOI	10.1103/PhysRevFluids.7.013603
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000747882800001
关键词[WOS]	COALESCENCE ; SIMULATIONS ; MODELS
WOS研究方向	Physics
WOS类目	Physics, Fluids & Plasmas
资助项目	National Science Foundation of China[12102437] ; National Science Foundation of China[52176134] ; China Postdoctoral Science Foundation[2020M680690] ; Hong Kong RGC/GRF ; PolyU[152188/20E] ; Strategic Priority Research Program of Chinese Academy of Sciences[XDA17030100]
项目资助者	National Science Foundation of China ; China Postdoctoral Science Foundation ; Hong Kong RGC/GRF ; PolyU ; Strategic Priority Research Program of Chinese Academy of Sciences
论文分区	二类
力学所作者排名	1
RpAuthor	Zhang, Peng
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/88415
专题	高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	He CM,Yue LJ,Zhang,Peng. Spin-affected reflexive and stretching separation of off-center droplet collision[J]. PHYSICAL REVIEW FLUIDS,2022,7,1,:25.
APA	何成明,岳连捷,&Zhang,Peng.(2022).Spin-affected reflexive and stretching separation of off-center droplet collision.PHYSICAL REVIEW FLUIDS,7(1),25.
MLA	何成明,et al."Spin-affected reflexive and stretching separation of off-center droplet collision".PHYSICAL REVIEW FLUIDS 7.1(2022):25.

条目包含的文件		下载所有文件
文件名称/大小	文献类型	版本类型	开放类型	使用许可
Jp2022FA554_2022_Spi（6741KB）	期刊论文	出版稿	开放获取	CC BY-NC-SA	浏览下载